242 entries under tough topic. ×

7
vital(adjective, energetic, powerful, lively)
7
zippy(adjective, sharp, energetic, powerful)
6
dense(adjective, person, set, body, hard)
6
dependable(adjective, good, honest, solid)
6
doughty(adjective, powerful, bold, spirited)
6
healthful(adjective, strength, fit, active)
6
indomitable(adjective, hard, great, firm)
6
iron(adjective, hard, power, firm)
6
robustious(adjective, force, power, strength)
6
rough(adjective, hard, intense, violent)
6
snappy(adjective, sharp, energetic, powerful)
6
thriving(adjective, sound, fit, happy)
6
unshakable(adjective, strong, hard, secure)
6
valorous(adjective, determined, noble, bold)
5
bitter(adjective, hard, sharp, intense)
5
bouncing(adjective, energetic, powerful, lively)
5
dogged(adjective, firm, energetic, determined)
5
heroic(adjective, great, powerful, noble)
5
indefatigable(adjective, sound, fit, firm)
5
normal(force, energy, fit, fresh)
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APASmart Define. (2016). strong thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/strong/thesaurus/synonyms
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 29 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms>